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Influence of Tempering Temperature in Wear of AISI T15 HSS Tools Produced by HIP and Liquid Phase Vacuum Sintering

Published online by Cambridge University Press:  01 February 2011

Emmanuel P. R. Lima ,
Maurício D. M. das Neves ,
Sérgio Delijaicov  and
Francisco A. Filho
Emmanuel P. R. Lima
Affiliation:
UnB – FGA – Universidade de Brasília – Faculdade do Gama, DF/Brazil CEP: 72405–610
Maurício D. M. das Neves
Affiliation:
Centro Univer. da FEI – UniFEI, Assunção, S. Bernardo do Campo/SP/Brazil CEP: 09850–901.
Sérgio Delijaicov
Affiliation:
Centro Univer. da FEI – UniFEI, Assunção, S. Bernardo do Campo/SP/Brazil CEP: 09850–901.
Francisco A. Filho
Affiliation:
Centro Univer. da FEI – UniFEI, Assunção, S. Bernardo do Campo/SP/Brazil CEP: 09850–901.
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Abstract

This work aims to investigate the influence of tempering temperature in the wear resistance of AISI T15 HSS tools produced by two different sintering processes – hot isostatic pressing (HIP) and liquid phase vacuum sintering. All materials are submitted to annealing at 870°C, quenching at 1210°C and triple tempering at 540, 550 and 560 °C. Density measurements, hardness and bend strength (transversal rupture strength – TRS) tests are accomplished. To identify the present phases and to evaluate the obtained microstructures, analysis in optical microscopy, SEM and EDX are done. Interchangeable inserts are manufactured by electrical discharge machining process. Frontal machining without coolant of normalized AISI 1045 steel plates is employed. The cutting forces are monitored via a transducer basically constituted of an instrumented table with four load cells mounted with “Strain Gages” sensors capable to measure the cutting efforts. The tools wear is analyzed and used to estimate the performance of two different HSS tools. For both investigated materials, the tools tempered at 540 °C show the lowest wearing.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1276: Advanced Structural Materials–2010 , 2010 , 8
Copyright
Copyright © Materials Research Society 2010

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References

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